Description:
* Approximately 1000 years into the Third Age, the Istari appeared in Middle-earth.

Curunír = Sindarin name of Saruman (Curunír 'Lân = Saruman the White). Curumo is Quenya for Curunír. 'Man of Craft' or 'Man of Skill'

"And Curunír 'Lân, Saruman the White, fell from his high errand, and becoming proud and impatient and enamoured of power sought to have his own will by force, and to oust Sauron; but he was ensnared by that dark spirit, mightier than he."

"Whereas Curunír was cast down, and utterly humbled, and perished at last by the hand of an oppressed slave; and his spirit went whithersoever it was doomed to go, and to Middle-earth, whether naked or embodied, came never back."

Unfinished Tales, Part Four, II - The Istari

"[Gandalf]: 'Yet he is great among the Wise. He is the chief of my order and the head of the Council. His knowledge is deep, but his pride has grown with it, and he takes ill any meddling. The lore of the Elven-rings, great and small, is his province. He has long studied it, seeking the lost secrets of their making...'"

LotR, FotR, Book One, II - The Shadow of the Past

[Gandalf:] "How far back his treachery goes, who can guess? [...] He was not always evil. Once I do not doubt that he was the friend of Rohan; and even when his heart grew colder, he found you useful still. But for long now he has plotted your ruin, wearing the mask of Friendship, until he was ready."

LotR, TTT, Book Three, VI - The King of the Golden Hall

"His face was long, with a high forehead, he had deep darkling eyes, hard to fathom, though the look that they now bore was grave and benevolent, and a little weary. His hair and beard were white, but strands of black still showed about his lips and ears."

"[Gandalf]: '...You have become a fool, Saruman, and yet pitiable. You might still have turned away from folly and evil, and have been of service. but you choose to stay... You have no colour now, and I cast you from the order and from the Council.'" And with that pronouncement, Gandalf broke Saruman's staff.

LotR, TTT, Book Four, X - The Voice of Saruman

'Who is Saruman?' asked Pippin. 'Do you know anything about his history?'

'Saruman is a Wizard,' answered Treebeard. 'More than that I cannot say. I do not know the history of Wizards. They appeared first after the Great Ships came over the Sea; but if they came with the Ships I never can tell. Saruman was reckoned great among them, I believe. He gave up wandering about and minding the affairs of Men and Elves, some time ago -- you would call it a very long time ago: and he settled down at Angrenost, or Isengard as the Men of Rohan call it. He was very quiet to begin with, but his fame began to grow. He was chosen to be head of the White Council, they say; but that did not turn out too well. I wonder now if even then Saruman was not turning to evil ways. But at any rate he used to give no trouble to his neighbours. I used to talk to him. There was a time when he was always walking about my woods. He was polite in those days, always asking my leave ... and always eager to listen. I told him many things that he would never have found out by himself; but he never repaid me in like kind. I cannot remember that he ever told me anything. And he got more and more like that; his face ... became like windows in a stone wall: windows with shutters inside.

'I think that I now understand what he is up to. He is plotting to become a Power. He has a mind of metal and wheels; and he does not care for growing things, except as far as they serve him for the moment. And now it is clear that he is a black traitor. He has taken up with foul folk, with the Orcs. ... Worse than that: he has been doing something to them; something dangerous. For these Isengarders are more like wicked Men. It is a mark of evil things that came in the Great Darkness that they cannot abide the Sun; but Saruman's Orcs can endure it, even if they hate it. I wonder what he has done? Are they Men he has ruined, or has he blended the races of Orcs and Men? That would be a black evil!'

Treebeard rumbled for a moment, as if he were pronouncing some deep, subterranean Entish malediction. 'Some time ago I began to wonder how Orcs dared to pass through my woods so freely,' he went on. 'Only lately did I guess that Saruman was to blame, and that long ago he had been spying out all the ways, and discovering my secrets. He and his foul folk are making havoc now. Down on the borders they are felling trees -- good trees. Some of the trees they just cut down and leave to rot -- orc-mischief that; but most are hewn up and carried off to feed the fires of Orthanc. There is always a smoke rising from Isengard these days.